Glowlight Rasbora Care Guide - Aquarium Setup, Diet & Breeding

The Glowlight Rasbora is a delicate, streamlined schooling fish with a translucent golden-silver body and a distinctive copper-orange stripe that runs along the upper side of the body. A dark wedge-shaped marking sits beneath this bright stripe, giving the species a refined appearance despite its tiny size. The fins are mostly clear, while the warm orange and amber tones become more noticeable when the fish is relaxed and settled in a group.

This species is peaceful, active and naturally sociable. Glowlight Rasboras spend much of their time moving through the middle levels of the aquarium, weaving between one another in a loose shoal rather than forming a rigid formation. Their activity and subtle colour changes are most impressive when they are kept in a properly sized group.

In the wild, they are associated with quiet, shaded waters surrounded by dense vegetation and overhanging forest growth. Leaf litter, submerged roots and dark, tannin-rich water create a subdued environment in which their reflective bodies and copper markings provide effective camouflage.

Trigonostigma hengeli is often confused with the closely related Lambchop Rasbora, Trigonostigma espei, but the Glowlight Rasbora is generally slimmer and has a finer, more sharply defined orange stripe. Its small adult size and gentle temperament have made it a popular choice for peaceful community aquariums and planted nano-style displays.

Glowlight Rasboras, also known as Hengel’s Rasboras, originate in parts of Indonesia in Southeast Asia, particularly the islands of Borneo and Sumatra. They inhabit slow-moving forest streams, peat-swamp waterways and other shaded habitats with soft, often tannin-stained water.

A group of Glowlight Rasboras should have at least 60 litres, with a footprint of approximately 60 × 30 cm or larger. Use a fine, dark substrate with dense planting around the sides and rear, leaving open swimming space through the centre. Driftwood, roots, leaf litter and floating plants help recreate their shaded forest habitat, while gentle filtration, subdued lighting and some water movement provide a secure and natural-feeling environment.

Males reach around 2.5 cm (1 inch), while females can grow to approximately 3 cm (1.2 inches) in length.

Glowlight Rasboras are omnivores that feed on tiny insects, crustaceans, worms and other small organisms in their natural habitat. Offer a varied diet of high-quality micro pellets or finely crushed flakes supplemented with baby brine shrimp, daphnia, cyclops and other small frozen or live foods. Several small portions are preferable to one large meal, and all food should be small enough for their tiny mouths.

Glowlight Rasboras are well suited to peaceful community aquariums. Appropriate tankmates include small Corydoras, pygmy catfish, kuhli loaches, small peaceful tetras, celestial pearl danios, sparkling gouramis and other calm Southeast Asian nano fish. Avoid large, boisterous or predatory species, fin-nippers and territorial fish that may intimidate or consume them, including larger cichlids and many larger barbs.

Glowlight Rasboras are egg-scattering fish that spawn among fine-leaved plants or other suitable spawning media. For the best results, place a conditioned pair or small group in a separate, dimly lit breeding aquarium with soft, slightly acidic water. Spawning usually takes place among the leaves, after which the adults should be removed because they may eat the eggs. The eggs generally hatch within a day or two, and the tiny fry can be raised on infusoria or another suitably fine first food before moving on to larger foods.

Females are usually slightly larger and deeper-bodied than males, particularly when carrying eggs. Males tend to be slimmer and may show more intense colouration, although the differences are subtle in young or poorly conditioned fish.